permissions
syntax
dir
|
drwx rwx rwx
(owner) (group) (other)
u g o
notation
$ chmod u=rwx <file> # give owner read, write, execute
$ chmod 700 <file> # give owner read, write, execute
$ chmod 777 <file> # give owner, group, other read, write, execute
octal vs symbolic
$ chmod u=rwx <file> # symbolic notation
$ chmod 700 <file> # octal notation
octal binary symbolic
7 111 rwx
6 110 rw-
5 101 r-x
4 100 r--
3 011 -wx
2 010 -w-
1 001 --x
0 000 ---